The Argos G2 842 HD has a secure, ergonomic, and comfortable one-handed grip. They come with superior quality Advanced fully multi-coated lenses for sharp contrast, true colour, and excellent light-gathering capabilities. They also have Bak-4 prism glass featuring our ne.w ESP Dielectric coating and phase correction for colour fidelity and sharpness. Argon gas purging makes the Argos binoculars waterproof and fog proof. A lightweight magnesium alloy chassis reduces weight, taking the strain off your neck but making it strong enough for the harshest environments.ESP Dielectric Coating- Enhanced Spectral Dielectric Coating:ESP Dielectric Coating is a multi-layer prism coating that reflects over 99% of the light to your eyes bringing you a clear, bright image that displays accurate colour reproduction.XPL Coating- Xtra Protective Layer coating:XPL Coating gives you extra protection on the exterior lenses from dirt, oil, and scratchesLightweight Magnesium Chassis:Magnesium chassis give you the strength of a metal chassis while reducing the weight by as much as 35%Phase Corrected prisms:Phase-corrected prisms produce images that have better contrast, a higher resolution, and better color reproductionBaK4 prisms:Bak-4 glass prisms reflect more light to your eyes which will give you a brighter and sharper image.Advanced FMC:Advanced Fully Multi-Coated lenses give you better light transmission to bring optimum brightness and true colour across the entire light spectrum.Long Eye Relief:Long eye relief can be particularly important for eyeglass wearers because longer eye relief allows them to still see the entire field of view.Close Focus:Close focus is important for those who are nature observers and especially important if you are going to watch butterflies or insectsTwist-Up Eyecups:Twist-up eyecups with intermediate stops allow you to set the eyecups to the ideal eye relief for your eyesWaterproof:Waterproof to protect the binoculars in the harshest weather conditions or if accidentally submerged underwaterSpecifications:Power: 8xObjective Lens Diameter: 42mmEye Relief: 17.3 mmField of View Angular: 7.1 degreesField of View FT @1000 YARDS: 371 ftField of View M @1000 METERS: 137 mClose Focus: 4 m/13 ftInterpupillary Distance: 56mm-76mmWeight: 25.5 oz